Mohajerani Seyed Hasan, Tabeie Faraj, Bemanali Mehdi, Tabrizi Reza
*Department of Oral and Maxillofacial Surgery, Dental School †Physiotherapy Research Center, School of Rehabilitation, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
J Craniofac Surg. 2017 Jun;28(4):e408-e411. doi: 10.1097/SCS.0000000000002929.
The major concern of sagittal split osteotomy (SSO) is the neurosensory disturbance. The authors investigated the effect of low-level laser therapy and light-emitting diode on the inferior alveolar nerve recovery after SSO.
In this double-blinded randomized clinical trial, 20 subjects with inferior alveolar nerve injury after SSO of the mandible were studied. Neurosensory recovery was assessed by 6 tests: visual analog scale (VAS), brush stroke, 2-point discrimination, contact detect detection, pinprick nociception, and thermal discrimination, and each one was performed before and after the surgery on days 1, 3, 7, 14, 60, and 180.
After 1 week, the VAS score in the laser group significantly improved in comparison with the control group. Visual analog scale score improvement was 25% (P = 0.015) at 2 weeks, 21% (P = 0.001) at 2 months, and 24% (P = 0.001) at 6 months. After 2 weeks, the brush stroke score improvement was significant in the laser group. The improvement values were 21.5% (P = 0.002) at 2 months and 15.1% (P = 0.004) at 6 months.
Low-level laser therapy and light-emitting diode may improve VAS scores, 2-point discrimination, and brush stroke test results without any effect on the pinprick or contact detection test results.
矢状劈开截骨术（SSO）的主要问题是神经感觉障碍。作者研究了低强度激光疗法和发光二极管对SSO后下牙槽神经恢复的影响。
在这项双盲随机临床试验中，对20名下颌骨SSO后出现下牙槽神经损伤的受试者进行了研究。通过6项测试评估神经感觉恢复情况：视觉模拟量表（VAS）、笔触测试、两点辨别觉、接触觉检测、针刺痛觉和温度辨别觉，每项测试均在术后第1天、第3天、第7天、第14天、第60天和第180天进行手术前后的测量。
1周后，激光组的VAS评分与对照组相比有显著改善。2周时VAS评分改善25%（P = 0.015），2个月时改善21%（P = 0.001），6个月时改善24%（P = 0.001）。2周后，激光组的笔触测试评分有显著改善。2个月时改善值为21.5%（P = 0.002），6个月时为15.1%（P = 0.004）。
低强度激光疗法和发光二极管可能会改善VAS评分、两点辨别觉和笔触测试结果，而对针刺或接触觉检测结果没有任何影响。
